Figure 3.

Flow cytometric analysis of caspase-1-positive keratinocytes

(A) Population distribution of caspase-1-containing keratinocytes after 48 h of infection with HL053PA1 (red) compared with uninfected cells (green).

(B) Population distribution of caspase-1-containing keratinocytes after 48-h exposure to 2.5 μM extracted porphyrins (maroon).

(C) Caspase-1-positive population expressed as percentage of total cells in the sample. Error bars represent standard error of the mean. ∗∗∗p < 0.005, ∗∗∗∗p < 0.0001